to the emotional debate over gun control.presidentobamawithstrong words after the senate failed to pass a key proposal to expand background checks. he called it a shameful day in washington and vowed to keep fighting. john carl has the story. >> the amendment is not agreed to. >> reporter: just as the bill was voted down, two victims of gun violence scream out in the senate chamber. >> shame on you! >> the president joined by gabby giffords and some of the families were anger. >> all in all this was a shameful day for washington. >> reporter: afterwards the newtown families told us they were disappointed but determined. >> we don't have a political agenda. we just don't want other people to suffer through this. we want their passing to mean something, to have a purpose. >> reporter: james and natalie barden lost their little brother daniel in the sandy hook massacre. >> i feel that we owe it to daniel because his life needed to mean something. >> he was just so thoughtful and he thought about everybody. he was always happy. >> reporter: senator rand paul yesterday accused the president of usi